Several mitigation methods have been proposed or tested in recent years.
近年来，有人提出或试验了一些缓解的办法。
Today? S topic will focus on indoor air pollutants, their sources, as well as mitigation methods.
今天的主题就是要讨论室内空气污染的来源及如何减低室内空气污染。
Analyze the factors which influence failure effect, and constitute mitigation methods of failure effect according to situations of meeting an emergency, closure and management after an accident.
分析了失效后果的影响因素，制定了管道维修措施及流程、事故应急准备和善后措施。
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